Campbell Biology Plus Masteringbiology
10th Edition
ISBN: 9780321775849
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 24, Problem 8TYU
SCIENTIFIC INQUIRY • DRAW IT In this chapter, you read thut bread wheat (Triticum aestivum) is an allohexaploid, containing two sets of chromosomes from each of three different parent species. Genetic analysis suggests that the three species pictured following this question each contributed chromosome sets to T. aestivum. (The capital letters here represent sets of chromosomes rather than individual genes, and the diploid chromosome number for each species is shown in parentheses.)
Evidence also indicates that the first polyploidy event was a spontaneous hybridization of the early cultivated wheat species T. monococcum and a wild Triticum grass species. Based on this information, draw a diagram of one possible chain of events that could have produced the allohexaploid T. aestivum.
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SCIENTIFIC INQUIRY • DRAW IT Assume you are mappinggenes A, B, C, and D in Drosophila. You know that these genesare linked on the same chromosome, and you determine therecombination frequencies between each pair of genes to be asfollows: A–B, 8%; A–C, 28%; A–D, 25%; B–C, 20%; B–D, 33%.(a) Describe how you determined the recombinationfrequency for each pair of genes.(b) Draw a chromosome map based on your data
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SCIENTIFIC INQUIRY The diagram in question 6 represents just a few of the chromosomes of a meiotic cell in a certain person. Assume that the freckles gene is located at the locus marked F, and the hair-color gene is located at the locus marked H, both on the long chromosome. The individual from whom this cell was taken has inherited different alleles for each gene (“freckles” and “black hair” from one parent, and “no freckles” and “blond hair” from the other). Predict allele combinations in the gametes resulting from this meiotic event. (It will help if you draw out the rest of meiosis and label the alleles by name.) List other possible combinations of these alleles in this individual’s gametes.
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Chapter 24 Solutions
Campbell Biology Plus Masteringbiology
Ch. 24.1 - Prob. 1CCCh. 24.1 - WHAT IF? Suppose two bird species live in a...Ch. 24.2 - Summarize key differences between allopatric and...Ch. 24.2 - Prob. 2CCCh. 24.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 24.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 24.3 - 1. What are hybrid zones, and why can they be...Ch. 24.3 - WHAT IF? Consider two species that diverged while...Ch. 24.4 - Speciation can occur rapidly between diverging...Ch. 24.4 - Prob. 2CC
Ch. 24.4 - Prob. 3CCCh. 24 - Explain the role of gene flow in the biological...Ch. 24 - Can factors that cause sympatric speciation also...Ch. 24 - What factors can support the long-term stability...Ch. 24 - Is speciation something that happened only in the...Ch. 24 - The largest unit within which gene flow can...Ch. 24 - Prob. 2TYUCh. 24 - Prob. 3TYUCh. 24 - Prob. 4TYUCh. 24 - Which of the following factors would not...Ch. 24 - Plant species A has a diploid chromosome number of...Ch. 24 - Prob. 7TYUCh. 24 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 24 - Prob. 9TYUCh. 24 - Prob. 10TYUCh. 24 - WRITE ABOUT A THEME: INFORMATION In sexually...Ch. 24 - Prob. 12TYU
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- WRITE ABOUT A THEME: INFORMATION The continuity oflife is based on heritable information in the form of DNA. In ashort essay (100–150 words), relate the structure and behaviorof chromosomes to inheritance in both asexually and sexuallyreproducing species.arrow_forwardWhat is one statement that would support the theory that all organisms are related? A) The genetic code is almost universal.B) All flies have 2 wings.C) Eukaryotes have mitochondria.D) Prokaryotes have circular chromosomes.E) That the Theory of Pangenesis has held up to scrutiny for thousands of years What is the difference between cross and self-fertilization? A. In cross-fertilization the gametes from one plant are used to fertilize the gametes of another plantB. In cross-fertilization the gametes from one plant are used to fertilize the gametes from the same plant C. In self-fertilization the gametes from one plant are used to fertilize the gametes from another plantD. In cross-fertilization insects are used to pollinate the plants while in self-fertilization the investigator pollinates the plantsarrow_forwardHow many chromatids are there on any chromosome at the end of S, before meiosis 1? a) 2 b) 8 c) 1 d)4 An H bond is (all that apply) a) bonds that occur between Po4 and OH in DNA (polymerization) b) occurs between H and a more electronegative atom c) occurs between H and O or between H and N d) bonds present between the DNA strands (between A and T) e) bonds that occur between the electrons of H (H-H)arrow_forward
- Q. What are the possible changes in chromosome number and structure that will occur in a living species with six haploid chromosomes ? You can give the phenotypic changes that will occur on a real and / or hypothetical sample.arrow_forwardMAKE CONNECTIONS Look at Figure 12.7 and imagine the twodaughter cells undergoing another round of mitosis, yielding four cells.Compare the number of chromosomes in each of those four cells, aftermitosis, with the number in each cell in Figure 13.8, after meiosis. Whatis it about the process of meiosis that accounts for this difference, eventhough meiosis also includes two cell divisions?arrow_forward2) Meiosis and sexual reproduction are, in large part, responsible for genetic variation within a population. Meiosis supports genetic variation in several ways. All BUT ONE applies to meiosis, sexual reproduction and genetic variation. A) Meiosis is preceded by DNA replication of chromosomes in the nucleus of the mother cell. B) As seen in the diagram, during meiosis crossing over, or swapping of DNA segments, may occur. C) During fertilization each parent randomly contributes a unique set of chromosomes to the zygote. D) Because of recombination and independent assortment during meiosis, each of the four gametes contains a different set of DNA. Not Gradedarrow_forward
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